The Witcher 3 Treasure Hunt: a Costly Mistake Side Quest Walkthrough

Embark on the Costly Mistake Treasure Hunt quest in The Witcher 3: Wild Hunt with this comprehensive walkthrough. Discover the locations, key steps, and strategies to successfully complete the quest and claim the hidden treasures.

by Srinithi

Updated Jul 15, 2023

The Witcher 3 Treasure Hunt: a Costly Mistake Side Quest Walkthrough
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The Witcher 3 

The Witcher 3: Wild Hunt, released in 2015, is an immersive action role-playing game created and published by CD Projekt. Serving as the continuation of The Witcher 2: Assassins of Kings, this installment marks the third entry in The Witcher video game series and introduces players to a vast open world presented from a third-person perspective. The game draws inspiration from the captivating fantasy novels penned by Andrzej Sapkowski.

Within The Witcher 3, players find themselves immersed in a fictional universe deeply rooted in Slavic mythology. Assuming the role of Geralt of Rivia, a highly skilled and sought-after monster slayer known as a Witcher, they embark on a quest to locate his adopted daughter, who is being pursued by the mystical and otherworldly Wild Hunt.

Armed with weaponry and magic, players engage in combat with various adversaries while also interacting with non-playable characters and undertaking quests to earn experience points and gold. These resources can be used to enhance Geralt's abilities and acquire equipment. The narrative of the game offers three distinct endings, determined by the choices made by the player at pivotal moments.

Development of The Witcher 3 commenced in 2011 and spanned three and a half years. The game's world draws heavily from the cultures of Central and Northern Europe. CD Projekt utilized the REDengine 3 to bring this complex narrative to life within an expansive open world. The musical score, predominantly composed by Marcin Przybyłowicz and performed by the Brandenburg State Orchestra, adds further depth to the game's immersive experience.

Originally released for PlayStation 4, Windows, and Xbox One in May 2015, The Witcher 3: Wild Hunt received critical acclaim. Its gameplay, storyline, world design, combat mechanics, and visuals were widely praised, though it did receive some criticism for technical issues. The game garnered over 200 game of the year awards and has been hailed as one of the greatest video games ever created.

Two highly acclaimed expansions, Hearts of Stone and Blood and Wine, were released subsequently. In August 2016, a Game of the Year edition including the base game, expansions, and all downloadable content was made available. As of March 2023, the game has sold over 50 million units, solidifying its status as one of the best-selling video games of all time.

The Witcher 3 Treasure Hunt: a Costly Mistake Side Quest Walkthrough

Start by heading left of Hangman's Alley and Blackbough until you reach a picturesque beach. This beach is the starting point for your Costly Mistake Treasure Hunt quest.

As you arrive at the beach, be prepared to face two level 4 Drowners. Engage them in combat and eliminate them swiftly to secure your safety.

After dealing with the Drowners, search the area for a body leaning against a boat. Loot the body carefully, as it holds a vital letter that will update the quest and provide further instructions.

Take a moment to read the letter you have obtained. It will reveal valuable information about the quest and guide you towards the next step.

Once you have read the letter, follow the quest marker that appears on your map. Proceed towards the marker cautiously, as there are multiple drowners lurking underwater in the area.

To dispatch the underwater drowners efficiently, equip your crossbow and take aim. One or two well-placed shots should be sufficient to eliminate them and ensure your safety.

With the drowners dealt with, dive into the depths of the sea. Swim towards the opposite end of the shipwreck, keeping an eye on the sea floor.

Explore the sea floor diligently, as this is where the treasure awaits. Utilize your Witcher Senses to locate and identify the treasure's exact location.Once you have found the treasure, claim it as your own and revel in the rewards it holds.

Where to Find the Witcher 3 Treasure Hunt?

To embark on the treasure hunt located on the northwestern coast of Velen, near the Hangman's Alley Fast Travel point, follow these detailed instructions:

1. Begin at the Hangman's Alley Fast Travel point, which serves as your starting location.

2. Proceed westward along the road, leaving Hangman's Alley behind. As you journey, you'll pass by an abandoned site on your way to the beach.

3. Once you arrive at the beach, you'll find the starting point of the treasure hunt. Take note that this specific quest involves sunken ships, adding to the excitement and potential rewards.

4. In addition to the initial treasure hunt, there are two more quests awaiting you in this area. These quests are named "Treasure Hunt: Sunken Treasure" and "Treasure Hunt: Queen Zuleyka's Treasure." Completing these quests will lead you to even more valuable riches.

5. As you begin the quest at the starting point, be prepared to face a group of drowners. Eliminate them before proceeding further.

6. After dealing with the drowners, you can search a recently deceased body located near a wrecked boat and a pile of rocks. This corpse will be highlighted by Geralt's Witcher Senses, drawing your attention to it. Within the body, you will find a key and a letter that are crucial to the progression of the quest.

Remember to stay vigilant and make effective use of Geralt's Witcher Senses to uncover hidden treasures and solve the mysteries along the way. Good luck with your treasure hunt!

Where to find the Chest?

Your coveted reward lies within close proximity. Prepare yourself for a swim into the vast ocean, where a sunken boat rests in the shallow waters. Navigate around the submerged vessel, relying on Geralt's keen Witcher Senses to guide you toward a chest concealed within the wreckage.

Once you have located the chest, utilize the recently acquired pilfered key to unlock its secrets. As the chest creaks open, signifying the culmination of your quest, you will be granted access to its treasures. Among the spoils, you will discover not only valuable items but also a formidable sword, renowned for its immense power.

Embrace the thrill of this triumphant moment as you claim your well-deserved rewards.

Where is Queen Zuleyka's Treasure?

To embark on your treasure-hunting adventure, make your way to the Coast of Wrecks. This location can be found southwest of Hangman's Alley, serving as a haven for those seeking hidden riches. If you haven't discovered this area already, set your course towards the southwest to reach the Coast of Wrecks.

Upon arriving at the coast, you'll encounter a band of nefarious pirates lurking along the shore. Engage them in combat and prove your prowess by eliminating the entire group. Only then can you proceed with your quest to claim the treasure that awaits.

As the pirates lie defeated, search the immediate vicinity for a crucial clue. Nearby, you will find a note that unveils valuable information regarding the whereabouts of the hidden treasure. Pay close attention to its contents as it will guide you towards your ultimate goal.

With the note in your possession, study it carefully to determine the next step in your journey. The note will provide you with crucial details, such as the exact location or a set of riddles to solve, to navigate closer to the treasure.

Prepare yourself for the challenges that lie ahead, as you explore the Coast of Wrecks, follow the clues, and unravel the mysteries that surround this fabled treasure. Good luck on your quest!

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The Witcher 3 Treasure Hunt: a Costly Mistake Side Quest Walkthrough-FAQ

1. How can I start the Costly Mistake Treasure Hunt quest?    

   The Costly Mistake Treasure Hunt quest can be initiated by obtaining the relevant treasure map. Look for it as a loot drop, in hidden chests, or from certain merchants.

2. Where can I find the starting point for the Costly Mistake Treasure Hunt quest?    

   The starting point for the Costly Mistake Treasure Hunt quest is a beach located left of Hangman's Alley and Blackbough. Head southwest until you reach the beach.

3. What should I do after defeating the Drowners at the beach?    

   After dealing with the Drowners, search for a body leaning against a boat. Loot the body to find a crucial letter that will update the quest.

4.  How do I proceed after reading the letter in the Costly Mistake Treasure Hunt quest?    

Once you have read the letter, follow the quest marker on the map. Approach the marker cautiously, as there are multiple drowners underwater. Use your crossbow to eliminate them.

5. Where is the treasure located in the Costly Mistake Treasure Hunt quest?    

   The treasure can be found on the sea floor, opposite the end of the shipwreck. Dive into the depths and explore diligently. Use your Witcher Senses to locate and identify the treasure's exact location.